zhengchenyu created YARN-5919:
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Summary: FairSharePolicy is not reasonable when sorting the
application
Key: YARN-5919
URL: https://issues.apache.org/jira/browse/YARN-5919
Project: Hadoop YARN
Issue Type: Improvement
Components: yarn
Affects Versions: 2.7.1
Environment: CentOS-7.1
Reporter: zhengchenyu
Priority: Critical
Fix For: 2.7.1
I use the FairSharePolicy to sort the runnableApps in FSLeafQueue. For the
comparation of FSAppAttempt, s1Needy and s1Needy must be negtive. So
FairSharePolicy will use useToWeightRatio to compare. This algorithm only
consider the ResourceUsage of the FSAppAttempt. There is a unreasonable
phenomenon: A low ResourceUsage FsAppAttemp with no demand(or request) will be
in front of the queue, then skip this chance of assigning container.
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